Feature: 1. Multiple unlocking methods, supporting 500 fingerprints, 1000 IC card unlocking, password unlocking. 2. The 2‑wire system requires only two wires, and the power supply, audio, video and control signals are all transmitted through the 2‑wire non‑polar central power supply. 3. Use plug‑in connectors and DIP switches for quick installation. The integrated multifunctional functions and simple operation make the system more attractive. 4. Flexible cable connection, support in and out, branch and mixed mode. Using the integrated power supply, it supports up to 2 outdoor cameras and 6 indoor monitors (only 1 camera and 1 monitor are included). 5. 7in color TFT LCD has no radiation, low power consumption and high definition. The volume, brightness and contrast are adjustable. Support dual intercom communication between indoor monitors. 6. Durable aluminum alloy outdoor unit, rainproof and anti‑oxidation. With white light LED night vision device, support night vision effect. 7. Can unlock 2 locks at the same time. Support hands-free intercom, mute indoor intercom function, group call/intercom function. Specification: Item Type: Video Door Phone Material: Aluminum Alloy + ABS Plastic Outdoor Camera: Aluminum alloy external device with white LED night vision lens Camera: 1/3in CMOS 1000TV line Viewing Angle: 92° Minimum Illumination: 0.5Lux Unlock Type: Support 500 fingerprints, 1000 IC card and password unlock Connection Method: BUS 2-wire Installation Method: Wall-mounted Working Temperature: -30℃ to 50℃ Size: Approx. 200 x 100 x 55mm/7.9 x 3.9 x 2.3in Monitor: Screen: 7-inch LCD Effective Pixels: 800 x 480 Connection Method: BUS 2-wire Size: Approx. 238 x 169 x 24mm/9.4 x 6.9 x 0.9in How to Use: 1. Connect the indoor unit, outdoor unit and power supply with cables, and the power cord is connected to electricity 2. Adjust the color and brightness of the display, and use the intercom function of the doorbell 3. Connect the electronic lock at home to unlock the doorbell . Package List: 1 x Outdoor Camera1 x Indoor Monitor1 x DC24V 2.5A Power Supply5 x IC Card1 x 4 Core Connection Lock Terminal Wire1 x 2 Core Connecting Terminal Wire1 x Screw Pack1 x Bracket1 x 2 Hole Terminal1 x 3 Hole Terminal1 x 4 Hole Terminal1 x User Manual